ASICS Women's Hyper-Rocketgirl XCS Track & Field Shoe 100% Synthetic and mesh Synthetic sole SpEVA midsole offers durability and shock attenuation Trusstic System links the rearfoot and forefoot and shores the midfoot Women's specific fit has a last construction to meet the fit requirements of the woman athlete Solid rubber outsole helps increase durability and traction Spikeless outsole has aggressive lugs that provide traction on all surfaces including indoor tracks